Building children develope their skills
a. number sense and operations
b. operations and geometry
c. measurement and counting
d. measurement and geometry

D. measurement and geometry

Explanation:

Building helps children develop their _ measurement and geometry__ skills. The measurement and geometry skill of the children by observing buildings.

Geometry is a method or tool for understanding the relations among shapes and spatial properties. Children can develop spatial reasoning and can visualize shapes in different positions (orientation) when observing a building.

i think the answer is a, hope this is right, that would be my best guess.